@book{110741,
	author = {Sánchez Ybarra, Ma. de los Ángeles and Simroth López, Hugo},
	title = {Higiene /},
	publisher = {Universidad Autónoma de Querétaro,},
	year = {1997.},
	address = {Quéretaro, Qro. :},
	note = {Escuela Preparatoria "DR. Salvador Allende" Plantel Sur}
}